The Church of the Holy Cross on Krakowskie Przedmieście is Baroque in style and unusually rich in associations. In a pillar of the nave is sealed an urn containing Chopin's heart, brought from Paris after his death in 1849. A plaque on the pillar simply reads: "Where your treasure is, there too will be your heart" — from the Gospel of Matthew.
The church was badly damaged in 1944 — it became a German defensive position during the Warsaw Uprising — and reconstructed afterwards. The heart survived by being moved to the countryside. The church is now a well-restored Baroque interior with several notable paintings and sculptures, and is worth entering for its own sake.